Header pipe for heat exchanger, and heat exchanger

ABSTRACT

A header pipe (1) for a heat exchanger (100), and a heat exchanger (100). The header pipe (1) comprises: a first header pipe portion (11) extending in the axial direction of the header pipe (1) and having a first edge (111) and a second edge (112) that extend in the axial direction; and a second header pipe portion (12) extending in the axial direction of the header pipe (1) and having a first edge (121) and a second edge (122) that extend in the axial direction, wherein the first edge (111) of the first header pipe portion (11) is connected to the first edge (121) of the second header pipe portion (12), and the second edge (112) of the first header pipe portion (11) is connected to the second edge (122) of the second header pipe portion (12). The header pipe (1) of the present invention is easy to assemble, and improves the welding efficiency and welding quality.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a National Stage application of International Patent Application No. PCT/CN2016/093047, filed on Aug. 3, 2016, which claims priority to Chinese Patent Application No. 201510915140.6, filed on Dec. 10, 2015, each of which is hereby incorporated by reference in its entirety.

TECHNICAL FIELD

The present invention relates to a header pipe for a heat exchanger, and a heat exchanger.

BACKGROUND

A conventional heat exchanger, such as a microchannel heat exchanger, comprises heat exchange tubes such as flat tubes and header pipes, with partition plates being provided in the header pipes, and the header pipes having through-holes for connecting the heat exchange tubes.

SUMMARY

An object of the embodiments of the present invention is to provide a header pipe for a heat exchanger, and a heat exchanger, whereby for example the welding quality of the heat exchanger is improved.

An embodiment of the present invention provides a heat exchanger, comprising: a first header pipe part extending in an axial direction of the header pipe, the first header pipe part having a first edge and a second edge extending in the axial direction; and a second header pipe part extending in the axial direction of the header pipe, the second header pipe part having a first edge and a second edge extending in the axial direction, wherein the first edge of the first header pipe part is connected to the first edge of the second header pipe part, and the second edge of the first header pipe part is connected to the second edge of the second header pipe part.

According to an embodiment of the present invention, a through-hole for connecting a heat exchange tube is formed in each of the first header pipe part and the second header pipe part.

According to an embodiment of the present invention, at least one pair of adjacent edges amongst the first edge of the first header pipe part and the first edge of the second header pipe part, and the second edge of the first header pipe part and the second edge of the second header pipe part is provided with a flange, with the adjacent edges being connected by means of the flange.

According to an embodiment of the present invention, the flange protrudes towards the outside of the header pipe.

According to an embodiment of the present invention, at least one pair of adjacent edges amongst the first edge of the first header pipe part and the first edge of the second header pipe part, and the second edge of the first header pipe part and the second edge of the second header pipe part is covered with a strip, the strip being connected to the at least one pair of adjacent edges.

According to an embodiment of the present invention, the header pipe for a heat exchanger further comprises: a partition plate extending in the axial direction, the partition plate dividing an internal cavity of the header pipe into multiple chambers, wherein the strip is connected directly to the partition plate.

According to an embodiment of the present invention, the header pipe for a heat exchanger further comprises: a partition plate extending in the axial direction, the partition plate dividing an internal cavity of the header pipe into multiple chambers, and an individual connecting plate, connected directly to the strip and the partition plate respectively.

According to an embodiment of the present invention, the strip is disposed outside the header pipe, a gap is provided between the at least one pair of adjacent edges, and the partition plate is connected directly to the strip via the gap.

According to an embodiment of the present invention, the strip is disposed outside the header pipe, a gap is provided between the at least one pair of adjacent edges, and the connecting plate is connected directly to the strip and the partition plate respectively via the gap.

According to an embodiment of the present invention, the connecting plate is provided with a through-hole allowing a refrigerant to pass through.

According to an embodiment of the present invention, the at least one pair of adjacent edges covered with the strip have a substantially planar shape, and the strip has a substantially planar shape.

According to an embodiment of the present invention, the header pipe for a heat exchanger further comprises: a partition plate extending in the axial direction, the partition plate dividing an internal cavity of the header pipe into multiple chambers; the partition plate has a first part, and two second parts extending transversely in opposite directions from two longitudinally extending opposite edges of the first part, wherein longitudinal edges, opposite two edges of the first part respectively, of the two second parts are connected to an inner wall of the header pipe.

According to an embodiment of the present invention, the two second parts are substantially perpendicular to the first part.

According to an embodiment of the present invention, the first part passes through an axis of the header pipe.

According to an embodiment of the present invention, when viewed in cross section, the partition plate is centrosymmetric relative to the center of the partition plate.

According to an embodiment of the present invention, at least one pair of adjacent edges amongst the first edge of the first header pipe part and the first edge of the second header pipe part, and the second edge of the first header pipe part and the second edge of the second header pipe part is covered with a strip, the strip being connected to the at least one pair of adjacent edges, and an individual connecting plate being connected directly to the strip and the first part of the partition plate respectively.

According to an embodiment of the present invention, the connecting plate and the first part of the partition plate are substantially in the same plane.

According to an embodiment of the present invention, a heat exchanger is provided, the heat exchanger comprising: the header pipe for a heat exchanger as described above.

According to an embodiment of the present invention, a heat exchanger is provided, the heat exchanger comprising: two first header pipes; a second header pipe, being the header pipe for a heat exchanger as described above, the second header pipe comprising a partition plate, the partition plate extending in the second header pipe substantially in a longitudinal direction of the second header pipe and being used to divide an internal cavity in the second header pipe into a first chamber and a second chamber; a first heat exchange tube, connected between one of the two first header pipes and the second header pipe and being in fluid communication with said one of the two first header pipes and the second chamber of the second header pipe; a second heat exchange tube, connected between said one of the two first header pipes and the second header pipe and being in fluid communication with said one of the two first header pipes and the first chamber of the second header pipe; a third heat exchange tube, connected between the other one of the two first header pipes and the second header pipe and being in fluid communication with said other one of the two first header pipes and the first chamber of the second header pipe; and a fourth heat exchange tube, connected between the other one of the two first header pipes and the second header pipe and being in fluid communication with said other one of the two first header pipes and the second chamber of the second header pipe.

According to an embodiment of the present invention, the second header pipe is disposed between the two first header pipes, and the first heat exchange tube, the second heat exchange tube, the third heat exchange tube and the fourth heat exchange tube extend in substantially the same direction.

In the heat exchanger according to an embodiment of the present invention, a refrigerant can flow from the first heat exchange tube to the first chamber of the second header pipe through said one of the two first header pipes and the second heat exchange tube, then flow from the first chamber of the second header pipe to the third heat exchange tube, and flow from the third heat exchange tube into the second chamber of the second header pipe through said other one of the two first header pipes and the fourth heat exchange tube.

According to an embodiment of the present invention, the cross-sectional area of the first heat exchange tube is greater than the cross-sectional area of the second heat exchange tube, and the cross-sectional area of the third heat exchange tube is greater than the cross-sectional area of the fourth heat exchange tube.

According to an embodiment of the present invention, the width of the first heat exchange tube is greater than the width of the second heat exchange tube, and the width of the third heat exchange tube is greater than the width of the fourth heat exchange tube.

According to an embodiment of the present invention, the heat exchange capability of the first heat exchange tube is greater than the heat exchange capability of the second heat exchange tube, and the heat exchange capability of the third heat exchange tube is greater than the heat exchange capability of the fourth heat exchange tube.

According to an embodiment of the present invention, the number of flow channels in the first heat exchange tube is greater than the number of flow channels in the second heat exchange tube, and the number of flow channels in the third heat exchange tube is greater than the number of flow channels in the fourth heat exchange tube; moreover, a flow cross-sectional area in the first heat exchange tube is greater than a flow cross-sectional area in the second heat exchange tube, and a flow cross-sectional area in the third heat exchange tube is greater than a flow cross-sectional area in the second heat exchange tube.

According to an embodiment of the present invention, the partition plate has a first part, and two second parts extending transversely in opposite directions from two longitudinally extending opposite edges of the first part, wherein longitudinal edges, opposite two edges of the first part respectively, of the two second parts are connected to an inner wall of the second header pipe.

According to an embodiment of the present invention, the two second parts are substantially perpendicular to the first part.

According to an embodiment of the present invention, the width of the first part is less than a dimension of the internal cavity of the second header pipe in the width direction of the first part, such that in the width direction of the first part, the two second parts are respectively located between the first heat exchange tube and the second heat exchange tube, and between the third heat exchange tube and the fourth heat exchange tube.

According to an embodiment of the present invention, the first part passes through an axis of the second header pipe.

According to an embodiment of the present invention, the second header pipe has an internal cavity with a circular cross section.

According to an embodiment of the present invention, when viewed in cross section, the partition plate is centrosymmetric relative to the center of the partition plate.

According to an embodiment of the present invention, the first to the fourth heat exchange tubes respectively extend in a first direction, and are arranged in a second direction substantially perpendicular to the first direction, with the first heat exchange tube and the fourth heat exchange tube being located on one side of the heat exchanger, and the second heat exchange tube and the third heat exchange tube being located on another side of the heat exchanger. Said one side and said other side are opposite each other in a third direction substantially perpendicular to the first direction and the second direction.

In the heat exchanger according to an embodiment of the present invention, for example, the welding quality of the heat exchanger can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic three-dimensional view of a header pipe of a heat exchanger according to a first embodiment of the present invention;

FIG. 2 is a schematic three-dimensional view of a partition plate and an end cap of the heat exchanger according to the first embodiment of the present invention when same are fitted together;

FIG. 3 is a schematic top view of the header pipe of the heat exchanger according to the first embodiment of the present invention;

FIG. 4 is a schematic three-dimensional view of a header pipe of a heat exchanger according to a second embodiment of the present invention;

FIG. 5 is a schematic top view of the header pipe of the heat exchanger according to the second embodiment of the present invention when fitted together;

FIG. 6 is a schematic three-dimensional view of a header pipe of a heat exchanger according to a third embodiment of the present invention;

FIG. 7 is a schematic top view of the header pipe of the heat exchanger according to the third embodiment of the present invention;

FIG. 8 is a schematic three-dimensional view of a partition plate, connecting plates and strips of the heat exchanger according to the third embodiment of the present invention;

FIG. 9 is a schematic three-dimensional view of flow gathering of a heat exchanger according to a fourth embodiment of the present invention;

FIG. 10 is a schematic top view of the header pipe of the heat exchanger according to the fourth embodiment of the present invention;

FIG. 11 is a schematic three-dimensional view of a heat exchanger according to an embodiment of the present invention; and

FIG. 12 is a schematic partial enlarged view of a heat exchanger according to an embodiment of the present invention.

DETAILED DESCRIPTION

Referring to FIGS. 1 to 12, a heat exchanger 100 according to an embodiment of the present invention comprises: heat exchange tubes 5, such as flat tubes; fins disposed between the heat exchange tubes 5; and header pipes 1.

As shown in FIGS. 11 and 12, a heat exchanger 100 according to other embodiments of the present invention comprises: two header pipes 1A; a header pipe 1 (described in detail below), the header pipe 1 comprising a partition plate 2, the partition plate 2 extending in the header pipe 1 substantially in a longitudinal direction of the header pipe 1 and being used to divide an internal cavity in the header pipe 1 into a first chamber A and a second chamber B; first heat exchange tubes 5 a, connected between one of the two header pipes 1A and the header pipe 1 and being in fluid communication with said one of the two header pipes 1A and the second chamber B of the header pipe 1; second heat exchange tubes 5 b, connected between said one of the two header pipes 1A and the header pipe 1 and being in fluid communication with said one of the two header pipes 1A and the first chamber A of the header pipe 1; third heat exchange tubes 5 c, connected between the other one of the two header pipes 1A and the header pipe 1 and being in fluid communication with said other one of the two header pipes 1A and the first chamber A of the header pipe 1; and fourth heat exchange tubes 5 d, connected between the other one of the two header pipes 1A and the header pipe 1 and being in fluid communication with said other one of the two header pipes 1A and the second chamber B of the header pipe 1. In other words, the heat exchange tubes 5 comprise the first heat exchange tubes 5 a, the second heat exchange tubes 5 b, the third heat exchange tubes 5 c and the fourth heat exchange tubes 5 d. Fins are provided between the first heat exchange tubes 5 a, between the second heat exchange tubes 5 b, between the third heat exchange tubes 5 c and between the fourth heat exchange tubes 5 d. According to some embodiments of the present invention, the header pipe 1 is disposed between the two header pipes 1A, and the first heat exchange tubes 5 a, the second heat exchange tubes 5 b, the third heat exchange tubes 5 c and the fourth heat exchange tubes 5 d extend substantially in the same direction. A refrigerant can flow from the first heat exchange tube 5 a to the first chamber A of the header pipe 1 through said one of the two header pipes 1A and the second heat exchange tube 5 b, then flow from the first chamber A of the header pipe 1 to the third heat exchange tube 5 c, and flow from the third heat exchange tube 5 c into the second chamber B of the header pipe 1 through said other one of the two header pipes 1A and the fourth heat exchange tube 5 d. For example, after evaporating in the first heat exchange tube 5 a, the refrigerant flows to the first chamber A of the header pipe 1 through one of the two header pipes 1A and the second heat exchange tube 5 b, then flows from the first chamber A to the third heat exchange tube 5 c, and after condensing in the third heat exchange tube 5 c, flows into the second chamber B of the header pipe 1 through the other one of the two header pipes 1A and the fourth heat exchange tube 5 d, so as to form a loop.

As shown in FIGS. 11 and 12, according to an embodiment of the present invention, the cross-sectional area of the first heat exchange tube 5 a is greater than the cross-sectional area of the second heat exchange tube 5 b, and the cross-sectional area of the third heat exchange tube 5 c is greater than the cross-sectional area of the fourth heat exchange tube 5 d. The width of the first heat exchange tube 5 a is greater than the width of the second heat exchange tube 5 b, and the width of the third heat exchange tube 5 c is greater than the width of the fourth heat exchange tube 5 d. The heat exchange capability of the first heat exchange tube is greater than the heat exchange capability of the second heat exchange tube, and the heat exchange capability of the third heat exchange tube is greater than the heat exchange capability of the fourth heat exchange tube. For example, the number of flow channels in the first heat exchange tube is greater than the number of flow channels in the second heat exchange tube, and the number of flow channels in the third heat exchange tube is greater than the number of flow channels in the fourth heat exchange tube; moreover, a flow cross-sectional area in the first heat exchange tube is greater than a flow cross-sectional area in the second heat exchange tube, and a flow cross-sectional area in the third heat exchange tube is greater than a flow cross-sectional area in the second heat exchange tube. According to an embodiment of the present invention, referring to FIGS. 1 to 10 and 12, the partition plate 2 or a main body 21 of the partition plate 2 has a first part 211, and two second parts 212 extending transversely in opposite directions from two longitudinally extending opposite edges of the first part 211, wherein longitudinal edges, opposite two edges of the first part 211 respectively, of the two second parts 212 are connected to an inner wall of the header pipe 1. The two second parts 212 may be substantially perpendicular to the first part 211. The width of the first part 211 is less than the dimension of the internal cavity of the header pipe 1 in the width direction of the first part 211, such that in the width direction of the first part 211, the two second parts 212 are respectively located between the first heat exchange tube 5 a and the second heat exchange tube 5 b, and between the third heat exchange tube 5 c and the fourth heat exchange tube 5 d. The first part 211 may pass through an axis of the header pipe 1. The header pipe 1 may have an internal cavity with a circular cross section. When viewed in cross section, the partition plate 2 or the main body 21 of the partition plate 2 is centrosymmetric, relative to the center of the partition plate 2 or the center of the main body 21 of the partition plate 2.

According to an embodiment of the present invention, as shown in FIGS. 11 and 12, the first heat exchange tubes 5 a to the fourth heat exchange tubes 5 d respectively extend in a first direction, and are arranged in a second direction substantially perpendicular to the first direction, with the first heat exchange tubes 5 a and the fourth heat exchange tubes 5 d being located on one side of the heat exchanger, and the second heat exchange tubes 5 b and the third heat exchange tubes 5 c being located on another side of the heat exchanger. Said one side and said other side are opposite each other in a third direction substantially perpendicular to the first direction and the second direction. As shown in FIGS. 1 to 12, the header pipe 1 comprises: a first header pipe part 11 extending in an axial direction of the header pipe 1, the first header pipe part 11 having a first edge 111 and a second edge 112 extending in the axial direction; and a second header pipe part 12 extending in the axial direction of the header pipe 1, the second header pipe part 12 having a first edge 121 and a second edge 122 extending in the axial direction; the first edge 111 of the first header pipe part 11 is connected to the first edge 121 of the second header pipe part 12, and the second edge 112 of the first header pipe part 11 is connected to the second edge 122 of the second header pipe part 12. The first header pipe part 11 and the second header pipe part 12 may have a semicircular shape or any other suitable shape in cross section.

In some embodiments of the present invention, referring to FIGS. 1, 4, 6, 9, 11 and 12, through-holes for connecting the heat exchange tubes 5 are formed in each of the first header pipe part 11 and the second header pipe part 12. Thus, each of the first header pipe part 11 and the second header pipe part 12 can be connected to the heat exchange tubes 5.

In some embodiments of the present invention, referring to FIGS. 1, 2, 11 and 12, at least one pair of adjacent edges amongst the first edge 111 of the first header pipe part 11 and the first edge 121 of the second header pipe part 12, and the second edge 112 of the first header pipe part 11 and the second edge 122 of the second header pipe part 12 is provided with a flange 15, with the adjacent edges being connected by means of the flange 15. In the embodiments shown, each pair of adjacent edges amongst the first edge 111 of the first header pipe part 11 and the first edge 121 of the second header pipe part 12, and the second edge 112 of the first header pipe part 11 and the second edge 122 of the second header pipe part 12 is provided with a flange 15. The flange 15 may protrude towards the outside of the header pipe 1. Optionally, the flange 15 could also protrude towards the interior of the header pipe 1. Adjacent flanges 15 may be provided with through-holes, in order to locate and fix the first header pipe part 11 and the second header pipe part 12 using locating pins, rivets or bolts, etc. during assembly. Adjacent flanges 15 may be welded together.

In some embodiments of the present invention, referring to FIGS. 4 to 10, at least one pair of adjacent edges amongst the first edge 111 of the first header pipe part 11 and the first edge 121 of the second header pipe part 12, and the second edge 112 of the first header pipe part 11 and the second edge 122 of the second header pipe part 12 is covered with a strip 16, the strip 16 being connected to the at least one pair of adjacent edges. In the embodiments shown, each pair of adjacent edges amongst the first edge 111 of the first header pipe part 11 and the first edge 121 of the second header pipe part 12, and the second edge 112 of the first header pipe part 11 and the second edge 122 of the second header pipe part 12 is covered with a strip 16, the strips 16 being connected to two pairs of adjacent edges respectively. The strip 16 may be connected to the at least one pair of adjacent edges by welding. The strip 16 may be disposed outside or inside the header pipe 1.

In some embodiments of the present invention, referring to FIGS. 1 to 10 and 12, the header pipe 1 further comprises: a partition plate 2 extending in the axial direction, the partition plate 2 dividing the internal cavity of the header pipe 1 into multiple chambers. The strip 16 may be directly connected to the partition plate 2.

In some embodiments of the present invention, referring to FIGS. 1 to 10 and 12, the partition plate 2 has a main body 21, the main body 21 extending in the header pipe 1 substantially in the axial direction of the header pipe 1 and being used to divide the internal cavity in the header pipe 1 into multiple chambers. The header pipe 1 further comprises an end cap 3 for closing an opening at an end of the header pipe 1. The partition plate 2 may have a through-hole. The partition plate 2 may have a protrusion 22 projecting from an end of the main body 21; and the end cap 3 has a main body 35, and a slot or through-hole 31 which is formed in the main body 35 of the end cap 3 and fits the protrusion 22.

In some embodiments of the present invention, referring to FIGS. 1 to 10 and 12, the partition plate 2 or the main body 21 of the partition plate 2 has a first part 211, and two second parts 212 extending transversely in opposite directions from two longitudinally extending opposite edges of the first part 211, wherein longitudinal edges, opposite two edges of the first part 211 respectively, of the two second parts 212 are connected to an inner wall of the header pipe 1. The two second parts 212 may be substantially perpendicular to the first part 211. The first part 211 may pass through an axis of the header pipe 1. When viewed in cross section, the partition plate 2 may be centrosymmetric relative to the center of the partition plate 2.

In some embodiments of the present invention, referring to FIGS. 6 to 8, the header pipe 1 further comprises: an individual connecting plate 17, connected directly to the strip 16 and the partition plate 2, or the main body 21 of the partition plate 2, respectively. For example, the connecting plate 17 is directly connected to the strip 16 and the first part 211 of the main body 21 of the partition plate 2 respectively. The connecting plate 17 and the first part 211 of the partition plate 2 may be substantially in the same plane. For example, the strip 16 is disposed outside the header pipe 1, a gap is provided between the at least one pair of adjacent edges, and the connecting plate 17 is connected directly, via the gap, to the strip 16 and the partition plate 2, or the main body 21 of the partition plate 2, respectively. The connecting plate 17 may be provided with a through-hole 171 allowing refrigerant to pass through.

In some embodiments of the present invention, referring to FIGS. 6 to 8, the connecting plate 17, the strip 16 and the partition plate 2 are an integral whole, e.g. are integrally formed by extrusion moulding.

Optionally, in some embodiments of the present invention, the strip 16 is disposed outside the header pipe 1, a gap is provided between the at least one pair of adjacent edges, and the partition plate 2 is connected directly to the strip 16 via the gap.

In some embodiments of the present invention, referring to FIGS. 9 to 10, the at least one pair of adjacent edges covered with the strip 16 have a substantially planar shape, i.e. have a substantially linear shape when viewed in a cross section of the header pipe. The strip 16 has substantially the same shape as the corresponding first edge 111 of the first header pipe part 11 and first edge 121 of the second header pipe part 12, and the corresponding second edge 112 of the first header pipe part 11 and second edge 122 of the second header pipe part 12, so as to facilitate welding. In FIGS. 9 and 10, the first edge 111 of the first header pipe part 11 and the first edge 121 of the second header pipe part 12, and the second edge 112 of the first header pipe part 11 and the second edge 122 of the second header pipe part 12 have a substantially planar shape, and the strip 16 has a substantially planar shape. In addition, in some embodiments, the first edge 111 of the first header pipe part 11 and the first edge 121 of the second header pipe part 12, and the second edge 112 of the first header pipe part 11 and the second edge 122 of the second header pipe part 12 are shaped substantially in the form of a columnar surface or a cylindrical surface, and the strip 16 is shaped substantially in the form of a columnar surface or a cylindrical surface; for example, when viewed in the cross section of the header pipe, the first edge 111 of the first header pipe part 11 and the first edge 121 of the second header pipe part 12, and the second edge 112 of the first header pipe part 11 and the second edge 122 of the second header pipe part 12, and the strip 16 have the same curved shape, a substantially arcuate shape, etc.

The heat exchanger according to an embodiment of the present invention may be used in various fields, such as the fields of air conditioning, freezing and chilling, motor vehicles and transportation, and may be a microchannel heat exchanger, a parallel-flow evaporator, a heat pump or a heat pipe heat exchanger etc.

According to an embodiment of the present invention, the processing of multiple-chamber header pipe components is achieved by simple processing, and the header pipe is improved by simple processing, in order to ensure the welding quality and structural strength of the header pipe.

According to an embodiment of the present invention, the fitting and processing of the end cap and the partition plate are simple, welding efficiency and quality are high, and furthermore, the heat exchanger is structurally compact, processing is simple and the pressure resistance effect is good.

According to an embodiment of the present invention, the fitting and processing of components of the header pipe are simple, welding efficiency is high, and welding quality is high. In addition, by forming through-holes 51 in the first header pipe part 11 and the second header pipe part 12 respectively, the formation of through-holes for heat exchange tubes in a single-piece tube such as a round tube is avoided, so processing is simple.

In addition, the above embodiments according to the present invention may be combined to form new embodiments.

While the present disclosure has been illustrated and described with respect to a particular embodiment thereof, it should be appreciated by those of ordinary skill in the art that various modifications to this disclosure may be made without departing from the spirit and scope of the present disclosure. 

What is claimed is:
 1. A header pipe for a heat exchanger, comprising: a first header pipe part extending in an axial direction of the header pipe, the first header pipe part having a first edge and a second edge extending in the axial direction; and a second header pipe part extending in the axial direction of the header pipe, the second header pipe part having a first edge and a second edge extending in the axial direction, wherein the first edge of the first header pipe part is connected to the first edge of the second header pipe part, and the second edge of the first header pipe part is connected to the second edge of the second header pipe part.
 2. The header pipe for a heat exchanger as claimed in claim 1, wherein: a through-hole for connecting a heat exchange tube is formed in each of the first header pipe part and the second header pipe part.
 3. The header pipe for a heat exchanger as claimed in claim 1, wherein: at least one pair of adjacent edges amongst the first edge of the first header pipe part and the first edge of the second header pipe part, and the second edge of the first header pipe part and the second edge of the second header pipe part is provided with a flange, with the adjacent edges being connected by means of the flange.
 4. The header pipe for a heat exchanger as claimed in claim 3, wherein: the flange protrudes towards the outside of the header pipe.
 5. The header pipe for a heat exchanger as claimed in claim 1, wherein: at least one pair of adjacent edges amongst the first edge of the first header pipe part and the first edge of the second header pipe part, and the second edge of the first header pipe part and the second edge of the second header pipe part is covered with a strip, the strip being connected to the at least one pair of adjacent edges.
 6. The header pipe for a heat exchanger as claimed in claim 5, further comprising: a partition plate extending in the axial direction, the partition plate dividing an internal cavity of the header pipe into multiple chambers, wherein the strip is connected directly to the partition plate.
 7. The header pipe for a heat exchanger as claimed in claim 5, further comprising: a partition plate extending in the axial direction, the partition plate dividing an internal cavity of the header pipe into multiple chambers, and an individual connecting plate, connected directly to the strip and the partition plate respectively.
 8. The header pipe for a heat exchanger as claimed in claim 6, wherein: the strip is disposed outside the header pipe, a gap is provided between the at least one pair of adjacent edges, and the partition plate is connected directly to the strip via the gap.
 9. The header pipe for a heat exchanger as claimed in claim 7, wherein: the strip is disposed outside the header pipe, a gap is provided between the at least one pair of adjacent edges, and the connecting plate is connected directly to the strip and the partition plate respectively via the gap.
 10. The header pipe for a heat exchanger as claimed in claim 7, wherein: the connecting plate is provided with a through-hole allowing a refrigerant to pass through.
 11. The header pipe for a heat exchanger as claimed in claim 5, wherein: the at least one pair of adjacent edges covered with the strip have a substantially planar shape, and the strip has a substantially planar shape.
 12. The header pipe for a heat exchanger as claimed in claim 1, further comprising: a partition plate extending in the axial direction, the partition plate dividing an internal cavity of the header pipe into multiple chambers; the partition plate has a first part, and two second parts extending transversely in opposite directions from two longitudinally extending opposite edges of the first part, wherein longitudinal edges, opposite two edges of the first part respectively, of the two second parts are connected to an inner wall of the header pipe.
 13. The header pipe for a heat exchanger as claimed in claim 12, wherein: the two second parts are substantially perpendicular to the first part.
 14. The header pipe for a heat exchanger as claimed in claim 12, wherein: the first part passes through an axis of the header pipe.
 15. The header pipe for a heat exchanger as claimed in claim 12, wherein: when viewed in cross section, the partition plate is centrosymmetric relative to the center of the partition plate.
 16. The header pipe for a heat exchanger as claimed in claim 12, wherein: at least one pair of adjacent edges amongst the first edge of the first header pipe part and the first edge of the second header pipe part, and the second edge of the first header pipe part and the second edge of the second header pipe part is covered with a strip, the strip being connected to the at least one pair of adjacent edges, and an individual connecting plate being connected directly to the strip and the first part of the partition plate respectively.
 17. The header pipe for a heat exchanger as claimed in claim 16, wherein: the connecting plate and the first part of the partition plate are substantially in the same plane.
 18. A heat exchanger, comprising: the header pipe for a heat exchanger as claimed in claim
 1. 19. A heat exchanger, comprising: two first header pipes; a second header pipe, being the header pipe for a heat exchanger as claimed in claim 1, the second header pipe comprising a partition plate, the partition plate extending in the second header pipe substantially in a longitudinal direction of the second header pipe and being used to divide an internal cavity in the second header pipe into a first chamber and a second chamber; a first heat exchange tube, connected between one of the two first header pipes and the second header pipe and being in fluid communication with said one of the two first header pipes and the second chamber of the second header pipe; a second heat exchange tube, connected between said one of the two first header pipes and the second header pipe and being in fluid communication with said one of the two first header pipes and the first chamber of the second header pipe; a third heat exchange tube, connected between the other one of the two first header pipes and the second header pipe and being in fluid communication with said other one of the two first header pipes and the first chamber of the second header pipe; and a fourth heat exchange tube, connected between said other one of the two first header pipes and the second header pipe and being in fluid communication with said other one of the two first header pipes and the second chamber of the second header pipe.
 20. The heat exchanger as claimed in claim 19, wherein: the second header pipe is disposed between the two first header pipes, and the first heat exchange tube, the second heat exchange tube, the third heat exchange tube and the fourth heat exchange tube extend in substantially the same direction.
 21. The heat exchanger as claimed in claim 19, wherein: a refrigerant can flow from the first heat exchange tube to the first chamber of the second header pipe through said one of the two first header pipes and the second heat exchange tube, then flow from the first chamber of the second header pipe to the third heat exchange tube, and flow from the third heat exchange tube into the second chamber of the second header pipe through said other one of the two first header pipes and the fourth heat exchange tube.
 22. The heat exchanger as claimed in claim 19, wherein: the heat exchange capability of the first heat exchange tube is greater than the heat exchange capability of the second heat exchange tube, and the heat exchange capability of the third heat exchange tube is greater than the heat exchange capability of the fourth heat exchange tube.
 23. The heat exchanger as claimed in claim 19, wherein: the number of flow channels in the first heat exchange tube is greater than the number of flow channels in the second heat exchange tube, and the number of flow channels in the third heat exchange tube is greater than the number of flow channels in the fourth heat exchange tube; moreover, a flow cross-sectional area in the first heat exchange tube is greater than a flow cross-sectional area in the second heat exchange tube, and a flow cross-sectional area in the third heat exchange tube is greater than a flow cross-sectional area in the second heat exchange tube.
 24. The heat exchanger as claimed in claim 19, wherein: the partition plate has a first part, and two second parts extending transversely in opposite directions from two longitudinally extending opposite edges of the first part, wherein longitudinal edges, opposite two edges of the first part respectively, of the two second parts are connected to an inner wall of the second header pipe.
 25. The heat exchanger as claimed in claim 24, wherein: the width of the first part is less than a dimension of the internal cavity of the second header pipe in the width direction of the first part, such that in the width direction of the first part, the two second parts are respectively located between the first heat exchange tube and the second heat exchange tube, and between the third heat exchange tube and the fourth heat exchange tube.
 26. The heat exchanger as claimed in claim 19, wherein: the first to the fourth heat exchange tubes respectively extend in a first direction, and are arranged in a second direction substantially perpendicular to the first direction, with the first heat exchange tube and the fourth heat exchange tube being located on one side of the heat exchanger, and the second heat exchange tube and the third heat exchange tube being located on another side of the heat exchanger. Said one side and said other side are opposite each other in a third direction substantially perpendicular to the first direction and the second direction. 